Desk-telephone.



E. R. GO'RWIN & G. A. BALS. DESK TELEPHONE. APPLICATION FILED MAR. 28,190B.

91 1,866. Patented Feb. 9, 1909.

struction of the 'ieexrisnr enrich.

TELEPHQNE MANUFACTURING GOMPZA'NY,

ILLEN 015,.

on *cnroaco, ILLINOIS, AOORPORATION on DE Sitilltlililftmsfil No.senses.

fipeoifl'eation of Letters Patent.

Patented Feb 9, lens.

hpphoetion flledfiiarch 28; 1308. fierial no. 23,8Bt5'.

To all whom it may concern: Be it known thatwe, Ethan and CHARLESA..BALS, both citizens of the United States of America, and residentsof. Chicago, Cook county, Illinois, have invented a new and usefulDesk-Telephone, of. which the following is a specification, refer encebeing had to the accompanying drawe inh's, illustrating same.

Our invention relates to telephones, and more particularly to that classoi telephones known as desk telephones.

The principal objects of our invention are to provide improved means forcontrolling switch contacts by the operation of the telephone receiverhook; to provideimproved means foroperatingg thev telephonereceiverhook; to provide. improvedmeans for read ily disassembling, sucha. telephone; to provide animproved spherical inge joint for supportingthe transmitter andpermitting an adjustment of same to-provide improvedmeans for carrying-the transmitterconduc tors to connection terminals inthe base of the telephone; to provide an improved conase portion of thetelephone; and to provide other-improved details. oi construction whichwill be. hereinafter described.

Other. objects will I be apparent from the. following specification.

In the drawings Figure 1 is a side elevation of the complete telephoneof the pres-- ent invention ,l ig. 2 is a front view or the telephoneshown in Fig. 1, with portions shown in vertical cross-section to s rowthe interior construction of the telephone; Fig.

3 is a bottom view of the circular base plate which carries variousportions of the apparatus, mounted thereto as shown; Fig. 4 1s avertical cross-sectional view of the vertical standard .oi the ,telehone, with portions shownin elevation, ta on in the osition shown inFig. 1, showing the gui ing ar rangement for the switch-contactcontrolling rod; Fig. 5 is a too view of the vertical standard of thetelephone, with the transmitter mounting cap removed, showing themounting. of the receiver hook within the vertical standard; Fig. 6 is.an elevation of. a portion offthe switch-contact controlling, rod,showinggthe screw adjustment tor-the. operating, spring- Figs. 7 andBare. detail views of. the

spring. catches. used for. holding thetwo circular base plates ofthetelephone'in place;

It. CORWIN standard 2, and the telep Fig. 9 is a verticalcross-sectional view of the sphericalhinge jointrfor the=transmitter,taken. on hne X Xof Fig.1; and Fig. 10 is a side elevation ofthe middleportion of the hinge joint shown in Fig; 9, taken the same as-in 1. f

Like c aracters refer to like'par'ts in the severalifigures, I i Thetelephone com rises the circular base portion 1, the vertic standard 2,the trans mitter 3 carried. by the 11 per portion of the hone receiverhook 4 pivoted within the vertical "standard 2 as shown lIl-Flg. 5. Thetransmitter 3. is suported by the sphericalhinge joint shown in .ig. 9,which oint is carried by acap 4'1 which fits over. the upper endof thestandard 2 and is. secured thereto by a screw. v e cap 41 is slotted-asat 42300: receive th'e re ceiver. hook 4. The binge-joint ismadeot'anexternal portion 43 which is slotted as at 44,- and an internal portion45,. located within the slot 44.. A bolt 46 extends through the ears 434:3 and through a hub 47 in the por tion 45, being threadedinto one ofthe ears 43] Ace nut 48 is screwed-onto the end of bolt 4.6, ttingWithima recess in the last mentioned car .43, to lodln the bolt 46 inplace. This construction provides'a smooth surface spherical hinge jointwhich. does away wit the-usual-outwardly projecting thumb screws or.nuts. The part is movable between-the ears 43 4.3 to permit the positionof the transmitter to be adjusted, but the fit between the art/5.43 43and 45 is sufficiently tight to hoh the transmitter in whatever positionit may be placed. The conductors leading from the. transmitter 3 extendthrough a hole 49 in the portion 45, through the annular cavity 50 inthe portion 45, on either side of the hub 47, and through a hole 51 inthe portion 43, into the vertical standard 2. The bottom part of theportion 45 isout off as at 53, to permit the portion T45 to be turnedbetween the cars 43 43 without cutting;- oi the passage leading; fromthe hole 51 to the cavity 50, and to provide stops to limit the movementof the transmitter. The vertical standard 2 is preferably made of metaltubing, the upper end bein slot-ted. as. atv tov receive. theieceirerhoo 4}, and, the. lowerrendlbein .tumed'down to form 'ashoulder 6Whichrs bulkier forms-.2. bearingv for the sheet-metalbase-portion 1, asshown inFig. 2.

Q 93.1,St16

The base portion of the telephone is made I of two cup-shapedsheet-metal portions 1 and 7, the portion 7 being placed within theportion 1 and the lower end of the standard 2 being turned over againstthe portion 7 so as to draw the portion 7 into the portion 1 and therebyform a substantial construction in the base portion and a substantialand rigid mounting for the standard 2. A strip or ring of leather 8 isplaced between the lower edge portions of the sheet-metal portions 1 and7, to form a suitable cushion for the telephone to rest upon, theleather strip 8 being firmly clamped in place between the portions 1 and7 by the lower end of the standard 2 being turned over against theportion 7 which draws the portions 1 and 7 together and thereby clampsthe leather strip 8 in place as shown in Fig. 2. Within the base portion7 are placed two circular sheet-metal disks 9 and 10 which areautomatically held in place within the base por tion 7 by spring catches11 and 12. The plate 9 is for carrying the apparatus shown in Fig. 3 andthe plate 10 is for closing the open end of the cup-shaped portion 7 soas to form an inclosure for tie apparatus shown in Fig. 3. 'l he plate 9is provided with two diametrically opposite notches 13 and 14 therein,for allowing it to beinserted in lace within the base portion of thetelep 10116. lhe plate 9 is inserted in place by placing the notch 13over the tongue portion 15 of spring 11, which serves as a guide forplate 9, so that the plate at the sides of the notch 13 rests upon theshoulders 16 16 of spring 11, and then depressing the plate 9 so thatthe free end of spring 12 passes through-"the notch 14 and springstoward the center of plate 9 so as tdcateh against the latter at theinner portion of the notch 14.

I In order to remove the plate 9 from the telephone it is only necessaryto press the free end of spring 12 away from the center of the platewhereupon the plate 9 can be readily pulled out of the base portion, thenotch 14 straddling the tongue portion 12 and the ton 'ue ortion 15 andshoulders 16 16 readily releasing the plate at the notch 13. Thecircular plate 10 is also provided with two diametricallyoppositenotches therein so th at when it is inserted within the baseportion of the telephone one of the notches therein straddles the tongueportion 17 of spring 12, the plate-at the sides of this notch restingagainst the shoulders 18 18, and the plate at the rear of this notchcatching under the end of tongue 17 and the other notch thereinstraddles the tongue portion 19 of spring 11, the plate at the sides, ofthis latter notchresting against the leaf scring 22 which in turn restsagainst the shou ders 20 20 of spring 11 when the plate is fullyinserted, tl e tongue 19 lein forced out or away from the center 0 theplate 111st the beveled tongue 21 on the plate, and than catchingagainst the outer side of the plate 10 when the tongue portion 21 isdepressed far enough to permit the spring 11 to spring back to theposition shown in ig. 2. The leaf s ring 22 is secured to the inner sideof the p ate 10 and is notched at its free end so as to straddle thetongue portion 19 of spring 11 when the plate 10 is placed within thebase portion of the telephone as shownv in l ig. 2.

In order to remove plate 10 from the base of the telephone it is onlynecessary to push the tongue portion 19 of spring 1.1 away from thecenter of the plate until it disengages the plate, whereupon the leafspring 22 forces the plate 10 out of the base of the telephone so thatit can b readily removed therel rom.

it will. readily be seen that the springs 11 and 12 provide automaticcatches for the plates 5 and 10 for securely holding the said plates inposition within the base portion of the telephone, and that the saidsprings 11 and 12 also permit of readily removing the plates Stand 10from the said base portion.

The liase late 9 carries an induction coil 23, a strip 0 insulation 24which is provided with a number of screw-contact connection terminals 404-0, a group of spring contact nicmliers 2'5, and a spring contactmember 26, all of which are suitallymounted. to the underneath side ofthe plate 9. One of the springs of the group 25 is formed with a thimble27 on its free end, through which thiinblc bent portion. 28 oi thevertical rod 29 extends, the said portion 28 being suitahly insulatedfrom the thilnble 27 and permitted to turn therein. The rod 2) extendsup through a hole in the plate .1 and through the hollow standard 2 tothan ceiver hook i, the upper end of the rod 2.) resting in an indenture30 in the underneath side of the receiver hook -l. A long coil sprin 31is placed over the rod 29 as shown in 1 lg. 2, the lower end of thespring 31 hearing against plate 9 and the upper end of spring 31 hearingagainst a nut 32 on the rod 29, the said spring 31 being for the purposeof operating the receiver hool: 4 and tor controlling the group ofspring contacts 25. The nut 32 is a screw adjustment on the rod 29whereby the compression of the spring 31 may be adjusted asjdcsired. Onthe lower portion of the rod 29, lteneath the plate 9, is provided ashoulder 33 for limiting the upward movement of the rod 29.

'When the receiver is huin upon the hook 4 the boot: is depressedthereby to the full-line position shown in Fig. 2, thereby depressin therod 2& and the thirnble 27 associated therewith aginst the action ofspring 31, and thus controlling the roup of an itch contacts as desired.51611 the receiver is removed. from the hook 4, the coil spring erases31 forcesthe hook 4 to the dotted line position shown in Fig. 2, throughtheagency'of the rod 29 "and thereby ra1sestiie 'thimble; 27 so astocon'tro'l'the group-oi switch con=' tacts as desired Thus it willbeseen'that by depressing'the hook 4; and releasing same the switchcontacts in the base portion ofthe tele hone are controlled, throughjtheagency of t e-rod 29 and the spring 3], associated therewith. Thisfeature permits the telephone to be readily disassembled, because whenthe base plate 9 is removed as hereinb'efore dcsoribed, all of theapparatus, including the grou of switch contacts 25, which isassociated'with the plate 9 is also entirelyremoved from the casing ofthe telephone.

This enables repairs to be'readilymade, the

parts to be readily adjusted and the circuit wiring to be readilyconnected to, the various parts of the apparatusr The group of switchcontacts or springs 25, andthe spring 26, and also .the induction coil23, are all preferably wired to the screw binding posts carried by thestrip 24, to which binding posts the several conductors of a cord 34,which extends through a hole in the side of the base shown in Figs. 2and 4; with a pair of ears 37 37 alon the middle thereof which bearagainst the inner surface of the tubular standard 2, and with a pair ofprojections 38 38 at its lower end which fit inslot'sin the lower end ofthe standard 2 as shown in Fig. 4, all of which securelyhol'd the metalstrip 35 in place and keep same from turning within the standard 2. Theslots in the lower end of the standard 2 serve toguidethe strip 35 \vhenthe latter is being inserted into the standard 2-from the bottom of thetelephone, i

so that the ears 36 36 will properly fit in place. When it is desired-to., remove th strip 35 from the standard 2, it is only necessary toress the cars 36 36 inwardly and then pull the strip 35 from the lowerend of the standard 2, providing the lates 10 and 9 have first beenremoved from t e telephone. ()n the lower end of thestrip 35 is mounteda pair of contact members 39 39 which ex tend through respective holesin the plate 9 and engage spring 26 and the u per spring of the group25, respectively, as s own in higs.

2 and 3. The circuit conductors leading from the transmitter 3 extenddown through the tubular standard 2 and are connected to the respectiveconnection treminals 39 'mitter' conductors.

This construction permits; the plate 9 with its apparatus to beentirei-jf removed from the base oi the telephone. withoutnecessitatmg'unsolde'ring or disconnecting the trans The transmitter conductors are preferably long enough to allow the strip 35 to be partiallyremoved from thestandard 2 without unsolderi'ng them from; theterminals39 39. The a'dvantages of such disassembling oi the telephone will bereadily appreciated by those familiar with the art.

' The internal wireso'f the telephone are preferably connected to thebinning posts 40- i 40 of strip" 24, by solder, while the externalconductors contained within the cord 34 are connected to the saidbinding posts 40 40 by the set-screw connections. a

We do not -W1Sl1t0 limit this invention toall of the particular detailsof construction herein shown, as many modifications may be madethereinwith'out departing from the scope of the appended claims.

What we claim as our invention is:

' 1. A telephoneof the character described,

comprising a base portion and a vertical standard extending therefrom, atelephonereceiver hook carried by the said standard, a

plate closing the lower end. of the base-por tion to form an inclosurethereln, a secondplate carried within the said inclo'su-re and avingapparatus mounted? thereon, mechanism mechanically connecting the saidreceiver hook with the said apparatus, and a pair of spring catchesadapted toautomatically clamp both of the said plates in place and topermit of the 'removalof same when.

desired, each plate being heldby both of the spring catches.

2-. A telephone'of the character described, comprising a base portionand a vertical standard extending therefrom, a telephone receiver hookcarried by the said standard, a

plate located withinthe base ortion, switchv contact members carried byt c said plate, a spring-controlled rod extending through the 'saidstandard from oneof the said switch contact members to the receiverhook, and a formed metal standard to guide the spring-controlled rodinto proper connection with the receiver hook.

I 3. A telephone of the character described, comprising a base portionand a vertical standard extending therefrom, a telephone transmittercarried by the said standard, a

telephone receiver hook carried by the said standard, a plate placedwithin'the base portion, switch contact members carried by thesaid'plate, a spring-controlled rod connecting one of the said springcontact members with thereceiverhook -whereby the operation of onecauses the operation of the. other, a

plate carried Within the said formed metal plate inserted within thesaid standard for guiding the said-rod into proper connection with, thereceiver hook, and a pair of contact members carried by the said formedmetal plate for receiving the transmitter conductors, the said pair ofcontact members separably engaging a pair of the =glate from the saidbase portion without 1 said cu -shaped portions, substantially as de- 3isconnecting the transmitter conductors.

4. A telephone of the character described,

comprising a base portion and a vertical l standard extending therefrom,a telephone 5 receiver hook carried by the said standard, a platelocated within the base contact members earriedby t e said late, a rodmechanically connecting one oft e said switch contact members with thereceiver hook whereby the operation of one causes the operation of theother, a coil spring encircling the said rod and acting on same, and

a nut carried by the said rod and adjustable near one on of t e tubeadapted to engage one of the said cup-shaped portions, and the latterend of the said tube being turned over a ainst the other said cup-shapedportion w ereby the cup-sha ed portions are drawn to other and the saidstrip of pliable materia is clamped between the open ends of the scribe6. In a telephone of the character described, a base portion, a verticalstandard extending from the base portion, a transmitter, and a hingejoint connecting the transmitter with the standard, the said jointportion, switch comprising a pair of ears and a central portion movablylocated between the ears, a bolt extending through the said ears and thecentral-portion and screwed into one of the in one of the said ears, tolock the said bolt in place, all formed and assembled to rovidc a smoothspherical surface for the sair joint.

v 7. A telephone of the character described, Q comprising a base portionand a vertical standard extending therefrom, a telephone receiver hookcarried by the said standard, a plate located within the base portion, sring catches holding the said plate in place w ieremembers carried bythe said plate, a springcontrolled rod extending throu h the saidstandard from one of the said switch contact members and removably engaing the receiver hook, and means for guiding the said spring-controlledrod into engagement with t e receiver hook.

8. A telephone of the character described, comprising a base portion anda vertical standard extending therefrom, a telephone receiver hookcarried by the said standard, a plate located within the base portion, 5)ring catches holdin the said plate in place w 1creby it is readiyremovable, switch contact members carried by the said plate, and aspring-controlled rod extending through the said standard from one ofthe said switch contact members and removably engaging the receiverhook.

, As inventors of theforegoing we hereunto subscribe our names in theprescnceof two subscribing witnesses, this 25th day of March,

ELMER R. CORWIN. CHARLES A. BALS.

Witnesses HARRY B. DAVIS, FRANK J. RYAN.

said. ears, and a cap nut on the said bolt with-- by it is readilyremovable, switch contact-

